ATHENA Complete Engine Gasket Kit without oil seals for RIEJU SM 125 and YAMAHA WR 125 2009-2018

On YAMAHA WR 125 and RIEJU SM 125 from 2009 to 2018, the ATHENA P400485850274 complete engine gasket kit fits in place of the original part. A full engine rebuild calls for new gaskets wherever parts have been separated. This kit saves you ordering gaskets one by one and makes sure the engine goes back together perfectly sealed.

Specifications

• Brand: ATHENA
• Manufacturer part number: P400485850274
• EAN code: 8056216245423
• Weight: 180 g
• Engine: 4-stroke

When to replace it?

• Oil seeping at the crankcase or cover joints.
• Coolant or oil leak after the engine has been apart.
• Gaskets hardened, torn or stuck to the parts on disassembly.

During a complete engine rebuild (connecting rod, crankshaft bearings, gearbox) or whenever the crankcases are split.

Fitting tips

1. Clean all the gasket faces without scratching them and remove any remains of old gaskets.
2. Fit the gaskets dry, except where the workshop manual specifies sealant.
3. Replace the O-rings at the same time: a crushed O-ring can't be reused.
4. With the cases split, also replace the crankshaft bearings and oil seals and check the gearbox bearings.
5. Tighten the crankcases and covers in a criss-cross pattern to the manufacturer's torque, then fill up with oil and coolant.

Why ATHENA?

Founded in 1973 near Vicenza, Athena is an Italian engine gasket specialist that has made its gaskets on its own production lines since day one, as well as a renowned manufacturer of pistons and cylinder kits. The brand supplies original equipment to manufacturers such as KTM, Ducati, Fantic, Piaggio and Triumph, and is a partner of the MXGP motocross world championship.

Spare parts and items to plan

• Engine oil seals : ATHENA · CENTAURO
• Gearbox bearings : see the selection
• 4-stroke engine oil : LIQUI MOLY 10W40 1 L · MOTUL 10W50
• Coolant : LIQUI MOLY 1 L · TWIN AIR

Frequently asked questions

Are the oil seals included?
No: this kit does not include the engine oil seals; order them separately if needed (engine oil seal kit).

What does the kit contain?
Depends on the model. Compare with your original gaskets if in doubt.

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
RIEJU SM 125 2018
RIEJU SM 125 2017
RIEJU SM 125 2016
RIEJU SM 125 2015
RIEJU SM 125 2014
RIEJU SM 125 2013
RIEJU SM 125 2012
RIEJU SM 125 2011
RIEJU SM 125 2010
RIEJU SM 125 2009
YAMAHA WR 125 2014
YAMAHA WR 125 2013
YAMAHA WR 125 2012
YAMAHA WR 125 2011
YAMAHA WR 125 2010
YAMAHA WR 125 2009